I have created a page and made a start here: http://wiki.centos.org/HowTos/postfix It's not finished yet, but please feel free to look at what I've done so far for correctness. I particularly struggled with the introduction so if anyone wants to offer comments or completely rewrite it, I won't be offended :) I'd also like to write a section on restrictions available in postfix but am unsure whether this would best be suited within this guide, in a separate guide or part of an advanced guide as offered by Matthew Bowman. I was thinking along the lines of this article, also published under creative commons license: http://www.freesoftwaremagazine.com/articles/focus_spam_postfix/ Any thoughts on where this may best be suited? I'm thinking a separate page on simple spam filtering in postfix to cover this material or even integrate it into the postgrey guide? Regards, Ned